2:27  

जातस्य हि ध्रुवो मृत्युर्ध्रुवं जन्म मृतस्य च ।
तस्मादपरिहार्येऽर्थे न त्वं शोचितुमर्हसि ॥२- २७॥

jaatasya hi dhruwo mRRityurdhruwaM janma mRRitasya cha ।

tasmaadaparihaarye'rthe na twaM shochitumarhasi ॥२- २७॥

Source: Automatic ITRANS Transliteration

Death is certain for the born and birth is certain for the dead.
Therefore, because of this inevitability, it is inappropriate for you to grieve.

Source: Milind S. Pandit

Because, death is certain for the one who is born, and birth is certain for the one who dies. Therefore, you should not lament over the inevitable.

Source: The Bhagavad-Gita: The Sacred Song

For one who has taken his birth, death is certain; and for one who is dead, birth is certain. Therefore, in the unavoidable discharge of your duty, you should not lament.

Source: Bhagavad Gita As It Is